Shortcut to plot relative to reference signal

Ocean/skill script follows. Select a net. Press ctrl-g. Now that net is your “reference”. Select a different net (or the same net if you are fond of trivial signals). Press ctrl-r that second net is plotted relative to the reference.

This is useful for debugging multiple supply domains, supply/ground bounce, and differential circuits.

procedure( relVT(netname)
  VT(netname) - VTGND
)

procedure( selVT()
  wid=hiGetCurrentWindow()
  path = geGetAdjustedPath(wid strcat(geGetInstHier(wid) "/" car(geGetSelSet())~>net~>name))
  relVT(path)
)

procedure( setGnd()
  wid=hiGetCurrentWindow()
  path = geGetAdjustedPath(wid strcat(geGetInstHier(wid) "/" car(geGetSelSet())~>net~>name))
  VTGND = VT(path)
)

procedure( plotSelVT()
  let( ((sVT selVT()))
    plot(sVT)
  )
)

hiSetBindKey("Schematics" "CtrlR" "plotSelVT()")
hiSetBindKey("Schematics" "CtrlG" "setGnd()")